The X-1’s fuselage was designed to resemble a .50 caliber bullet—one of the only shapes known to have stable flight at ...

The high-speed uncrewed test aircraft performed its first flight at Edwards AFB, just a year after the launch of the development. Hermeus, a U.S. company aiming to develop hypersonic aircraft quickly ...

NASA has successfully tested its X-66 aircraft in a wind tunnel, hoping it can reduce fuel consumption by at least 30%.

These are an ongoing series of extraordinary aircraft existing at the extreme cutting edge of technology. The “X-planes” are ...